Hi Greg, Thanks for the sage advice which saves a lot of money as usual. Your advice leads to further discovery like for instance http://www.robertreeves.com/startrails.htm where most Canon solutions for astrophotography are adressed which includes the program http://www.startrails.de/html/software.html "starttrails". Will run this tonight , weather permitting. The above solutions is a great solution for exactly the "whiteouts" with long exposures. Greg, where can I download APEX ? Matthias thanks for the link to astrotrac, now to get one in South Africa ! As once again all inputs are highly appreciated. As you said Greg, everone composes his own methodology, and so do I with all seesat members guidance. Many Regards Gerhard Groenewald ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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